/*
*********************************************************************************************************
*                                             uC/GUI V3.98
*                        Universal graphic software for embedded applications
*
*                       (c) Copyright 2002, Micrium Inc., Weston, FL
*                       (c) Copyright 2002, SEGGER Microcontroller Systeme GmbH
*
*              �C/GUI is protected by international copyright laws. Knowledge of the
*              source code may not be used to write a similar product. This file may
*              only be used in accordance with a license and should not be redistributed
*              in any way. We appreciate your understanding and fairness.
*
----------------------------------------------------------------------
File        : GUI__SetText.C
Purpose     : Implementation of said function
---------------------------END-OF-HEADER------------------------------
*/

#include <stdlib.h>
#include "GUI_Protected.h"
#include "GUI_ReDefine.h"


/*********************************************************************
*
*       Public code
*
**********************************************************************
*/
/*********************************************************************
*
*       GUI__SetText
*
*  Function description
*    GUI internal function.
*    Assigns a "C"-string to a memory handle.
*    Memory for the string is assigned, the string itself is copied to the allocated memory.
*    If the handle was valid before, the memory of the old string is released.
*
*  Parameters
*    phText     Pointer to the handle. The pointer must be valid, the handle may be 0 (invalid).
*    s          Pointer to the string to be copied.
*               A NULL pointer is not allowed.
*/
I32 GUI__SetText(GUI_HMEM* phText, const char* s)
{
	I32 r;
	GUI_HMEM hOld;

	r = 0;
	hOld = *phText;
	if (GUI__strcmp_hp(hOld, s) != 0) {            /* Make sure we have a quick out if nothing changes */
		GUI_HMEM hMem;
		I32 NewLen;
		I32 OldLen;

		NewLen = GUI__strlen(s) + 1;
		OldLen = GUI_ALLOC_GetSize(hOld);
		if (NewLen == OldLen) {
			char* pMem;
			pMem = (char*) GUI_ALLOC_h2p(hOld);
			GUI_memcpy(pMem, s, NewLen);
			r = 1;
		} else {
			hMem = GUI_ALLOC_AllocNoInit(NewLen);
			if (hMem) {
				char* pMem;
				pMem = (char*) GUI_ALLOC_h2p(hMem);
				GUI_strcpy(pMem, s);
				GUI_ALLOC_FreePtr(phText);
				*phText = hMem;
				r = 1;
			}
		}
	}
	return r;
}

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